Midi control messages are delayed

[Penguin-Warrior]

System Information

OpenSUSE Tumbleweed

LMMS Version(s)

1.2.2 (flatpak), 1.3.0~git2024.09.21-1.3 (repo-oss)

Most Recent Working Version

No response

Bug Summary

when using my midi keyboard (AKAI MPK49) LMMS controls do not correctly process control messages, always leaving a single message "queued" and only processing that message when a new message enters that "queue" or some other event triggers processing of midi control messages.
this results in, for example:

• buttons inverting their behaviour
• knobs and sliders sticking to the last value received before the intended value. this is particularly annoying when trying to zero or max a control.

additionally, certain other events will partially trigger processing:

• hovering certain buttons (mute, solo) will cause them to process the message
• other controls depending on that particular control will not be updated (hovering solo will update solo but not the mute buttons it normally toggles)

minor details:

• i have used drumstick midi monitor to verify the proper reception of midi control messages.
• notes do not display this issue. it only affects control messages.

Expected Behaviour

controls process midi control messages as they arrive.

Steps To Reproduce

1. use a midi keyboard
2. map a keyboard control to an LMMS control
3. try to use it, it will always display the second-last value received by LMMS

Logs

Click to expand

Screenshots / Minimum Reproducible Project

No response

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• I have searched all existing issues and confirmed that this is not a duplicate.